Attachment 362652 Details for Bug 194220 – Patch

[patch] Patch

bug-194220-20190222001216.patch (text/plain), 5.54 KB, created by Alicia Boya García on 2019-02-21 15:12:18 PST

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Creator: Alicia Boya García

Created: 2019-02-21 15:12:18 PST

Size: 5.54 KB

patch

obsolete

>Subversion Revision: 241865
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index 384c6eda7a23d255259b38b1a533b77d868a0cf4..e5ac8d05cfe90cbdcbd4151e1b48f975b5c57fe0 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,24 @@
>+2019-02-21  Alicia Boya GarcÃa  <aboya@igalia.com>
>+
>+        [MSE][GStreamer] Batch player duration updates
>+        https://bugs.webkit.org/show_bug.cgi?id=194220
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        This saves up a ton of CPU cycles doing layout unnecessarily when all
>+        the appended frames extend the duration of the movie, like in
>+        YTTV 2018 59.DASHLatencyVP9.
>+
>+        This patch is an optimization that introduces no new behavior.
>+
>+        * platform/graphics/gstreamer/mse/AppendPipeline.cpp:
>+        (WebCore::AppendPipeline::consumeAppsinkAvailableSamples):
>+        * platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.cpp:
>+        (WebCore::MediaPlayerPrivateGStreamerMSE::blockDurationChanges):
>+        (WebCore::MediaPlayerPrivateGStreamerMSE::unblockDurationChanges):
>+        (WebCore::MediaPlayerPrivateGStreamerMSE::durationChanged):
>+        * platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.h:
>+
> 2019-02-21  Rob Buis  <rbuis@igalia.com>
> 
>         Update MIME type parser
>diff --git a/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.cpp b/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.cpp
>index 97fc42a57a3fcf5136ca0bbe9cb1db9ad2de7574..cee536073a6ee4269beb6f99a47c190fc06478fe 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.cpp
>+++ b/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.cpp
>@@ -512,10 +512,15 @@ void AppendPipeline::consumeAppsinkAvailableSamples()
> 
>     GRefPtr<GstSample> sample;
>     int batchedSampleCount = 0;
>+    // In some cases each frame increases the duration of the movie.
>+    // Batch duration changes so that if we pick 100 of such samples we don't have to run 100 times
>+    // layout for the video controls, but only once.
>+    m_playerPrivate->blockDurationChanges();
>     while ((sample = adoptGRef(gst_app_sink_try_pull_sample(GST_APP_SINK(m_appsink.get()), 0)))) {
>         appsinkNewSample(WTFMove(sample));
>         batchedSampleCount++;
>     }
>+    m_playerPrivate->unblockDurationChanges();
> 
>     GST_TRACE_OBJECT(m_pipeline.get(), "batchedSampleCount = %d", batchedSampleCount);
> }
>diff --git a/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.cpp b/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.cpp
>index 8769b524fd4490a21e5f9b8ce7b6b197fc7b415f..583db6840d996d52e96e822fedbe42b09a45050d 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.cpp
>+++ b/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.cpp
>@@ -661,8 +661,28 @@ RefPtr<MediaSourceClientGStreamerMSE> MediaPlayerPrivateGStreamerMSE::mediaSourc
>     return m_mediaSourceClient;
> }
> 
>+void MediaPlayerPrivateGStreamerMSE::blockDurationChanges()
>+{
>+    ASSERT(isMainThread());
>+    m_blockingDurationChanges = true;
>+    m_durationChangedWhileBlocked = false;
>+}
>+
>+void MediaPlayerPrivateGStreamerMSE::unblockDurationChanges()
>+{
>+    ASSERT(isMainThread());
>+    if (m_durationChangedWhileBlocked) {
>+        m_player->durationChanged();
>+        m_playbackPipeline->notifyDurationChanged();
>+    }
>+
>+    m_blockingDurationChanges = false;
>+    m_durationChangedWhileBlocked = false;
>+}
>+
> void MediaPlayerPrivateGStreamerMSE::durationChanged()
> {
>+    ASSERT(isMainThread());
>     if (!m_mediaSourceClient) {
>         GST_DEBUG("m_mediaSourceClient is null, doing nothing");
>         return;
>@@ -676,8 +696,11 @@ void MediaPlayerPrivateGStreamerMSE::durationChanged()
>     // Avoid emiting durationchanged in the case where the previous duration was 0 because that case is already handled
>     // by the HTMLMediaElement.
>     if (m_mediaTimeDuration != previousDuration && m_mediaTimeDuration.isValid() && previousDuration.isValid()) {
>-        m_player->durationChanged();
>-        m_playbackPipeline->notifyDurationChanged();
>+        if (!m_blockingDurationChanges) {
>+            m_player->durationChanged();
>+            m_playbackPipeline->notifyDurationChanged();
>+        } else
>+            m_durationChangedWhileBlocked = true;
>         m_mediaSource->durationChanged(m_mediaTimeDuration);
>     }
> }
>diff --git a/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.h b/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.h
>index 87aa2ac088f6748467299f995ca5eb2c1e0d1469..afeafb66a6c595211094e92e36bf1df956e227df 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.h
>+++ b/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.h
>@@ -82,6 +82,9 @@ public:
>     void trackDetected(RefPtr<AppendPipeline>, RefPtr<WebCore::TrackPrivateBase>, bool firstTrackDetected);
>     void notifySeekNeedsDataForTime(const MediaTime&);
> 
>+    void blockDurationChanges();
>+    void unblockDurationChanges();
>+
> private:
>     static void getSupportedTypes(HashSet<String, ASCIICaseInsensitiveHash>&);
>     static MediaPlayer::SupportsType supportsType(const MediaEngineSupportParameters&);
>@@ -111,6 +114,8 @@ private:
>     RefPtr<MediaSourceClientGStreamerMSE> m_mediaSourceClient;
>     MediaTime m_mediaTimeDuration;
>     bool m_mseSeekCompleted = true;
>+    bool m_blockingDurationChanges = false;
>+    bool m_durationChangedWhileBlocked = false;
>     RefPtr<PlaybackPipeline> m_playbackPipeline;
> };
>

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Attachments on bug 194220: 361314 | 361317 | 362380 | 362381 | 362607 | 362616 | 362652 | 362742 | 362818 | 362824